Role of Lewis Acid Metal Centers in Metal–Organic Frameworks for Ultrafast Reduction of 4-Nitrophenol

Catalysts

Himanshu Sekhar Jena¹  Jagannath Panda²  Raghabendra Samantray²  Rojalin Sahu²  Arijit Mitra³  Soumya Prakash Biswal⁴ 

[1] Department of Chemistry, Ghent University, Krijgslaan 281-S3 B, 9000 Ghent, Belgium;Future Materials Laboratory, Department of Chemistry, School of Applied Sciences, KIIT Deemed to Be University, Bhubaneswar 751024, India;Institute of Physics, Bhubaneswar 751005, India;School of Chemical Technology, KIIT Deemed to Be University, Bhubaneswar 751024, India;

关键词: nano-metal organic frameworks (MOFs);    UiO-66;    catalyst;    reduction reactions;    reusability;   

DOI  :  10.3390/catal12050494

来源: DOAJ

【 摘 要 】

Metal–Organic Frameworks (MOFs) can be a good alternative to conventional catalysts because they are non-toxic and can be selective without compromising efficiency. Nano MOFs such as UiO-66 have proven themselves to be competitive in the catalytic family. In this study, we report the excellent catalytic behavior of UiO-66 MOF in the reduction of a model reaction: 4-Nitrophenol (4-NP) to 4-Aminophenol (4-AP) over MOF-5 (Zn-BDC) and MIL-101 (Fe-BDC). Nano UiO-66 crystals were synthesized by a hydrothermal process and characterized by Powder X-ray Diffraction, Diffused Reflectance UV-Vis spectroscopy, Scanning Electron Microscopy, and Transmission Electron Microscopy. The catalysts’ performance during the hydrogenation reduction reaction from 4-NP to 4-AP was investigated in the presence of a reducer, NaBH₄. The UiO-66 nano crystals exhibited excellent catalytic behavior owing to its large surface area and Lewis acidic nature at the metal nodes. Furthermore, UiO-66 showed excellent recyclability behavior, verified during repeated consecutive use in a sequence. The catalyst yielded similar catalytic behavior during the reduction of nitrophenols at each cycle, which is a novel finding.

【 授权许可】

Unknown